Bench clamp



Nov. 22, 1921.

H. w. DAVIS Bmw cmu Filed April. 16. 1927 Patented Nov. 22, 1927. Y

UNITED STATES PATENT oFF-icakHann-Y w. navrs, or nasriiivnnroononro.

BENCH y orinar?.l i

Appiieanon 'flied April 16', 19,27.` serial N6. 1845342.

The object of my said invention is the provision of a. simple andeliicient bench` clamp and one that is capable of bei'ngexpeditiouslyand easily operated. 'Y y To the attainment of the foregoing theinvention consists in the improvement hereinafterdescribed anddefinitely claimed.

In the accompanying drawings, forming part of 'this specification ioVFigure 1 is a top plan view of the benchl clamp constituting thepreferred embodi-A ment of my invention.

Figure 2 is an end elevation of the clamp; l

Figure 3 comprises disconnectedl perspectives of the rectilinearlymovable slide mem- `beriof'the clamp and the rubber facing for usevatthe under side of said slide member. Similar numerals of referencedesignate corresponding` parts in all of the views of the drawing.

I show iii Figures 1- and 2 the body 1 of my'novel clamp, the said body1 being designed to be superposed on a bench or other appropriatesupport,- and also designed to be fastened to the bench or support bylnails or screws, not shown, driven through apertures in lugs 2X. Themajor portionofthe body'l is formed by a plate 2, and at its under sidethe plate y2 is provided with ai marginal flange 3 from which the lugs2'Y extend and with longitudinal spaced pendent flanges 3X,

the said flanges 3 and 3X being designed to bear on the surface of thebench so that the plate 2 will be maintained in spaced relation to thesaid surface. stood that the body 1 is provided with an up standingintegral flange 4, the said Vflange 4 being preferably, though notnecessarily'V between tbe face of the flange or 4 and the movable -jaw11 of the clamp.

" The movable jaw 11 is superposed upon the body plate 2 and is providedwith' an abutment 12 at one end, ydisposed laterally to the majorportion of the j aw and it will It will also be under-- the clamp toreadily ascertain lthe distance.

also be understood that the jaw 1l is preferably, .though notnecessarily, provided with a facing 13 of wood or other materialdesign-ed to prevent bruising of wood or other comparativelysoft'material interposed and held bet-Ween theaw 4 andthe jaw 11. `At

its rear side the jaw l1 is provided with av flange'14 spaced above theplate 2,' Figure 2 and it will be understood that the said flange" 14'isprovided with an enlargement' 15 in]A which is a slot 1G extending at anacute angle to the 'face of the jaw 11. A

The slide member 10y of the clamp is dis?? posed above the plate 2 `andisV provided, by.` preference, at its underside with a facing 10X. ofrubber or other'friction creating ymaterial, the said facing 10Xbeingin'the form of a strip appropriately attached to the under s ideofthe slide member 10, `andithe said facing being designed'tov enablethe slidez member 10 to take better hold' on the upper side of the plate2 when the wing nut 17 on the headed bolt 18 is tightened. The saidheaded bolt 18kr is extended through the slot 7 ofthe body 1 and alsothrough aper-v tures'in the strip 10X'and theslide member 1Q, and isequipped below the plate-2 with a washer 19, and above the slide memberl() with a washer 20. The slide member 10is also equippedwith a verticalpin 21,V the said pin 21 having a port-ion21x-below the member 10 andarranged and movable in theV slot 7 for .the guidance of the slidemember 10, and said pin 21 beingfalso provided'with a T-head 22designed'to rest above the flange 14 of the-j aw 11 with a view tosecuring the said jaw flange 14 to and on the. slide member 10. f

It will'be apparent from the foregoing`l that the movable aw 11 of mynovel clamp is capable of simultaneous longitudinal and lateralmovement. The piece of material to beyclamped is designated'by 50 inFigures 1 and 2, andit'will'be understood that when the said piece ofmaterial is moved endwise against the abutment 12 of the jaw l1, thesaid jaw 11 willbe simultaneously "moved` forward and laterally towardthe jaw 4,.'a-nd in consequence the j aw 11 and the jaw 4`will` gripthelpiecevof material throughout the length and height of the jaws andwill hold it strongly Vuntil released by a rearward movement of thepiece of material, the re' traction of the piece vof material'servingbyvirtue of thev frictional contact'between the material and the faceofthe jaw l1 to move the said jaw 11 rearwardly and laterally awayfromnjaw'fi.

It will also be apparent from the foregoing that the slide member 10 andits appurtenances permits of the clamp being changed from right to lefthand and vice versa, and the said slide member and its appurtenancesalso provide for the ready adjustment of the clamp to pieces of materialofL ydifferent sizes. The reversible capacity ofthe clamp will better beunderstood when it is stat-ed that the clamp can be changed fromvright'hand to left hand, or from left hand to right hand in a very shorttime, and in order to make the change it is simply necessary to move theslide member 10 as far as possible from the jaw 4, turn the wing` nut 17so thatits lwings are'longitudinal of the slide member 10, and move thejaw 1l endwise rearwardly and manipulate the saine so that its slot 16is lengthwise of the T-head 22, lift theja-w 11 ofi thepin 21, turn thejaw 11 upside down, and then replace the jawV 11 on the pin 21. Thepositioning of the wings of the n ut y17 as stated is necessary for thesaid manipulation of the jaw 11. y

In order to assist in the return of the movable jaw to open lpositionand render it-easier` to placel a piece lof material in the cla-mp Iprovide a retractile spring 60. At one' end the said spring is connectedto the movable jaw, and atits opposite end the `spring is equipped witha pin 61, designed to be removably placed in any one of the lower set ofsockets 62, the said set of sockets being employed so that the springmay be tensioned as desired by the operator of the clamp. Manifestlywhen the clamp is changed for use as a left hand clamp, as beforeindicated, the pin` 61 will be placed in one ofthe upper sets of sockets62, Figure 1.

Notwithstanding the capacity of function ascribed tomy nov-el clamp, itwill be noted that the clamp is simple and inexpensive in construction,and in general is well adapted to withstand the usage to which bench andanalogous clamps are ordinarily subjected.

.l have entered into a detailed description of the construction andrelative arrangement of the parts embraced in the present and preferredembodiment of my invention in, Aorder to impart a full, clear and exact.understanding of the said embodiment. I do not desire, however, to beunderstood as limiting myself to the precise structure illustrated anddescribed, my invention being defined Vby my appended claims within thescope of which modifica-tions maybe made without departure from myinvention. l

Having thus described the invention, what A I claim is :e

1. A clamp comprising a body having a flange constituting a jaw, a slidemember guided on the body and movable at right angies to said jaw, andhaving an upstanding pin, means for adjiistably fixing said slide memberwith respect to said body, and a 'movable jaw on the body and having alateral abutment and also having a flange and a slot in said iange anddisposed at an acute angle to the face of the movable jaw, said slotreceiving the upstanding pin of said slide member. y

2. A clamp comprising a body having, a plate and pendent flanges at theunder side of said plate, t-he plate being provided with an upstandingflange constituting a jaw and being also provided with a slot disposedat right angles to t-he face of said jaw, apertuied lugs carried byflanges of the plate, a slide member disposed above the plate and havingfriction creating means vat it-s under side engaging the surface of theplate, a headed bolt having its shank disposed in said slot andextending through an aperture in the slide member, a nut threaded onsaid bolt shank and disposed y above the 'slide member, a pin carried bythe slide member and having a lower portion disposed in the slot andalso having an upstanding portion and a T-head thereon, and a movablejaw disposed on the plate and having at its back a iiange and alsohaving in said flange a slot disposed at an acute angle to the face ofthe jaw and receiving the upper portion of the upstanding pin on theslide member, the flange' of the movable jaw being disposed under thehead of said pin.

3. A clamp comprising a body having a plate and pendent flanges at theunder side of said plate, the plate. being provided Vwith anupstandingfiangeconstituting a jaw and being also provided with a slot disposed atright angles to the face of saidrjaw, apertured lugs carried by flangesof the plate, a slide member disposed above the plate and having4friction creating means at'its under side engaging the'surface of theplate, a headed bolt having its shank disposed in said slot andextending throughl an aperture inthe slide member, a nut threaded onsaid bolt shank and disposed above the slide meinber, a pin carried bythe slide member .and having a lower portion disposed inthe slot andalso having an upstanding portion and a T-liead thereon, and a movablejaw disposed on t-he plate and having at its back a flange and alsohaving in said iange a slot disposed at an acute angle to the face ofthe jaw and receiving the upper portion of the upstanding pin on Vt-heslide member, the flange of the movable jaw being disposed under thehead of said pin, the plate being provided at its upper side with ascale, and the slide member being provided with a pointer forcooperation with said scale, and the jaws being faced with comparativelysoft material to prevent bruising of material clamped between the jaws.

. A Clamp comprising a body having a flange constituting a jaw, a slidemember guided on the body and movable at right anglee to Said jaw, andhaving an upstanding TU pin, means 'for adjustably fixing said slidemember with respecty to said body, and a movable jaw on the body andhaving a lat-- eral abutment and also having a flange and a slot in saidflange disposed at an acute angle to the face of the movable jaw, saidslot receiving the npstanding pin of said slide member, in combinationwith a retraetile spring' interposed between and connected with the bodyand the movable jaw for as Sistine in the retraction of the latter.

5. A clamp Comprising a body having a flange constituting a jaw, a slidemember guided on the body and movable at right angels to said jaw, andhaving an upstanding receiving the upstandingr pin ol said slide member,in Combination with a retraetile spring interposed between and connectedwith the body and the movable jaw forassisting in the retraction of thelatter; Vthe body having a plurality of sockets, and the spring equippedwith a pin for removable disposition in oneof said sockets.

In testimony whereofl I ai'lix my signature HARRY XV. DAVIS.

